Description

The sip_msg_to_str() function returns the string representation of the SIP message sip_msg.
Deleted headers are not included in the returned string. The caller is
responsible for freeing the returned string.

The sip_hdr_to_str() function returns the string representation of the SIP header sip_header.
The caller is responsible for freeing the returned string.

The sip_reqline_to_str() function returns the string representation of the request line from
the SIP message sip_msg. The caller is responsible for freeing the returned
string.

The sip_respline_to_str() function returns the string representation of the response line from
the SIP message sip_msg. The caller is responsible for freeing the returned
string.

The sip_sent_by_to_str() function can be used to retrieve the list of sent-by
values registered with the stack. The returned string is a comma separated
list of sent-by values. The caller is responsible for freeing the returned
string.

Return Values

The sip_msg_to_str(), sip_hdr_to_str(), sip_reqline_to_str(), sip_respline_to_str(), and sip_sent_by_to_str() functions return the relevant string
on success and NULL on failure.

The value of errno is not changed by these calls in the
event of an error.

Errors

For the sip_msg_to_str(), sip_hdr_to_str(), sip_reqline_to_str(), and sip_respline_to_str(), one of the following values
is set if the error is non-null:

EINVAL

Input is null.

ENOMEM

Memory allocation failure.

On success, the value of the location pointed to by error is
set to 0.